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floor: Wasm text instruction

files/en-us/webassembly/reference/numeric/floor/index.md

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The floor instructions are used for getting the value of a number rounded down to the next integer.

floor differs from trunc when used on negative numbers, floor will round down in those cases while trunc will round up.

{{InteractiveExample("Wat Demo: floor", "tabbed-standard")}}

wat
(module
  (import "console" "log" (func $log (param f32)))
  (func $main

    f32.const -2.7 ;; load a number onto the stack
    f32.floor ;; round down
    call $log ;; log the result

  )
  (start $main)
)
js
const url = "{%wasm-url%}";
await WebAssembly.instantiateStreaming(fetch(url), { console });

Syntax

wat
;; load a number onto the stack
f32.const -2.7

;; round down
f32.floor

;; the top item on the stack will now be -3
InstructionBinary opcode
f32.floor0x8e
f64.floor0x9c